[lycier]

If you hold ♠10832, ♥AK93, ♦8743, ♣A, can you open?
If hold ♠AJ75, ♥652, ♦void, ♣KQJ976, can you open?

Perhaps over 80% people want to open, here I take a example at below.
JEC match
Playing time : 2016-04-07

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Here is another table for reference.

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As we know, JEC, Sbeatty and Adamw are USA star players, Jec and Sbeatty never open.
So this problem is only for partnership agreement.

[Zelandakh]

 lycier, on 2016-April-08, 05:29, said:

As we know, JEC, Sbeatty and Adamw are USA star players, Jec and Sbeatty never open.
So this problem is only for partnership agreement.

Stupid argument. We can all provide names for a number of world class pairs that would open marginal hands and others that would not. Providing these names does not advance the argument very far in terms of what is normal at club/advanced level, what is acceptable or what is best. I will merely point out that jec is known for having an extremely conservative style of opening amongst modern expert teams. I already pointed out that that can easily lead to more difficult judgement decisions on the subsequent rounds of bidding so I would not generally recommend this approach for I/A players.

[lycier]

Oh, yes, you are correct.

[billw55]

I can see downgrading the east hand for the stiff ace, although many would still open.

But I don't know what to say about failing to open the south hand. If I did not know who did it, I admit I would say with conviction that pass is just plain wrong. But obviously Jimmy could mop the floor with me. I guess styles vary more than I thought.

[Lovera]

Although the JEC hand in post #41 has (medialy) 16 valutation points, it satisfies the 20 rule, has a good club suit and a void (possible) to utilize :why not open ? To speculize ?